Machine



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' SEWING MACHINE.

No. 248,308. Patented Oct. 18,1881.

6 Sheets-Sheet 2.

L. GRISWOLD. SEWING MACHINE.

Patented Oct. 18,1881.

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SEWING MACHINE.

Patentd Oct. 18,1881.

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L. GRISWOLD. SEWING MACHINE.

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L. GRISWOLD. SEWING MAQHIN'E.

INVENTOR:

Patented Oct. 18,1881. Fay. f0;

UNITED STATES PATENT OFFICE.

LEV. GRISWOLD, OF NEW YORK, N. Y.

SEWING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 248,308, dated October 18, 1881.

Application filed September 17, 1879.

To all whom 'it may concern.-

Be it known that I, LEV. GRISWOLD, of the city, county, and State of New York, have invented a new and useful Improvement in Sewing-Maehines,of which the followingis a speci ficat-ion.

Myimprovement relates to that class of sewing-machines in which a reciprocating movement at right angles to the direction of the feed is imparted to the needle-bar,which movement may be automatically varied during the operation of sewing by means of the construction hereinafter fully described and claimed.

The following is such a full, clear, and exact description of my invention as will enable others skilled in the art to which it most nearly appertains to make and use the same when taken in connection with the accompanying drawings, in which- Figure l is a side view, showing the frame partially cutaway and the mechanism within.

. Fig. 2 is a view of the head,showing the outer face of the face-plate, some of the parts within being shown in dotted lines. Fig. 3 is an end view of the fixed arm, showing end of shaft, eccentric, crank-lever, and lever for raising the foot. Fig. 4 is a view of the mechanism of the head out through on the line at at, Fig. 1, and seen from the right of said figure. Fig. 5 is a view of the mechanism of the head attached to face-plate M ,as seen when the face-plate is removed. Fig. 6 is a vertical section of face- 7 plate and mechanism through the centerof the needle-bar. Fig. 7 is a horizontal section through a portion of the head, showing the ratchet-wheel, levers, and fulcrum-screws. Fig. 8 is a sectional view, showing ratchet-wheel, frame, pawl, arm, and link on line 3 3 Fig. 9. Fig. 9 is a side view of cam-wheel, sleeve,

ratchet-wheel, frame, pawl, spring, arm, and

link. Fig. 10 is a bottom view of the machine, showing shuttle-race, shuttle, and a portion of the operating mechanism. Figs. 11, 12,13, 14, 15, 16, and 17 show varieties of stitches made by this machine.

The machine to which my invention is applied is the two-shaft shuttle-machine shown in the drawingsa Singer machine-in which there is a rigid arm and a'fixed shuttle-raceat right angles to the feed.

- I The horizontal shaft E in the arm Chas moon, and transmits motion to the vertical shaft through the beveled-gear wheels, each of equal size. The shaftE projects beyond the fixed part M of the head of the machine, and has on it the eccentric G, which gives motion to the lever T and the crank-pin H, which works in the heart-cam L, and gives the vertical reciprocations to the needle-bar I.

The shuttle-race 80 is fixed to the under side of the bed-plate A at right angles to the diree-- the crank H to pass by the needle-bar when theneedlebar oscillates horizontally, as hereinafter described.

The needle-bar sleeve K fits between the fixed part M of the head of the machine on the arm 0 and the cap or face-plate M, being held by a lug, m,'on the face-plate M, and is free to vibrate toward and away from the shaft E. The lower portion of the fixed part M and faceplate M of the head of the machine are cut away to allow of a vibration of the needle-bar sleeve and needle-bar.

A spiral spring, S, presses against the fixed part M of the head of the machine and the side of the needle-bar sleeve, pressing the needle-bar and needle-bar sleeve toward the faceplate M. A piece of rawhide, S is inserted on the inside of the face-plate, for the needlebar sleeve to abut against as impelled by the spring S.

The lever O is arranged on proper lugs on the inner face of the lower portion of the faceplate M, so that at one end it will be alongside the toothed wheel and at the other end alongside the needle-bar sleeve K, and at its center on theopposite side from that on'which the wheel P and needle bar sleeve K are, on oragainst the end of the fulcrum-screwR, which is fitted in the screw-hole provided for it in the face-plate M. On turning in the screw B said screw comes in contact with the lever O at or near the centerthereof, and moves said'lever into contact at one end with the wheel P and at the other end with the needle-bar sleeve K. The wheel P has on it teeth or elevations, and is connected through an axle or sleeve with the ratchet-wheel P, which latter has twice as many ratchet-teeth as there are teeth on the wheel 1?. The ratchct-wheel P is caused to rotate byalever,T,hereinafter described,which moves it one tooth at each complete revolution of the shaft E and eccentric G and each complete vertical reciprocating motion of the needle-bar.

The lever 0, when pressed against the wheel P so as to be affected by it, receives therefrom avibration or oscillation completein each two complete vertical oscillations of the needle-bar and transmits such oscillations to the needlebar sleeve by pressing said sleeve against and partiallyovercoming the action of the spring S.

The extent to which the fulcrum-screw R is turned in or out regulates the position of the lever 0 in relation to the wheel P, and the extent to which the teeth thereon act upon the lever and through it overcome the action of the spring S and the consequent horizontal vibrations of the needle-bar sleeve and needlebar. The detent-spring s bears against the ratchet-wheel P, being attached to the faceplate M, and prevents any revolution of the ratchet-wheel P, excepting in one direction, as moved by the lever T. The lever T, by which the ratchet-wheel is moved, consists of two arms and the pivotpin t, which latter is firmly attached to the lever T, and is long enough on each side of the lever to allow a back-and-forth motion (in the direction of the axis of the pivot-pin t) of the lever T and pivotpin it. The pivot-pin t rests at either side of the lever in holes provided for it, one hole be ing in the fixed part M and the other in the face-plate M of the head of the machine, the holes being cut deep or recessed to allow the endwise motion of the pivot-pin t within them. The ends of pivot-pin t are long enough toallow this endwisc motion without escape from the holes.

The lever T is pressed by the springs t and I in the direction of the axis of the pivotpin it toward the ratchet-wheel P, so that the lower endof the lever T will bear against the ratchetteeth of the ratchet-wheel P or lie between them, and at the same time the leverT is pressed by the spring 15 so as to tend to turn it about the axis of the pivot-pin t. The upper end of the lever T is thus pressed against the cam G. A detent-spring, 8, fast to the head of the machine, catches in the teeth of the ratchet-wheel P and prevents any backward turning of the wheel. The lever T, being pressed against the cam G by the spring 25 is oscillated about the axis of the pivot-pin t by the revolution of the cam G, and being pressed against the ratchetwheel P the lever will be pressed between two teeth of the ratchet-wheel P and move it when the lever T is moved in one direction, and when the lever is moved in the opposite direction it will slide past the next tooth of the ratchetwheel P, which latter is now held from turning by the detent s, the lever being forced against the stress of the spring t (in the direction of the axis of the pivot-pin t) by the ratchet-tooth against which it bears, so that it shall pass that tooth. Thus thelever T has two motions-one of rotary oscillation about the axis of pivot-pin t, the other horizontal or sidewise sliding reciprocation in the direction ot'theaxis of the pivotpin t-the former being given it by the revolution of the cam G, and the latter by the oscillation ot'the lever past the teeth of the ratchet-wheel 1 as it is held by the detent-spring .9, both in connection with the action of the springs t and t Thus the lever T turns the ratchet-wheel P the extent ofone tooth at each oscillation.

Figs. 11, 12, and 13 show the stitch made by this machine when the lever 0 alone is in operation to oscillate the needle-bar horizontally.

In making use of the automatic mechanism to change the fulcrum of the lever 0, the fulerum-screw R is withdrawn so as not to bear against the lever 0.

To the lever O, at its fulcrum, is attached the end of the lever 5 by a screw or rivet. The lever 5, at or near theend opposite to that to which the lever O is attached, passes alongside ot the tlat cam-wheel 12, hereinafter described. At or near the center of the lever 5 the fulcrumscrew 6 is screwed in the face-plate so that its end projects through the inner side thereof and abuts against the lever 5 when turned in, and presses said lever 5 against the flat camwheel at one end and the leverO at the other by means of the connecting screw or rivet.

Theflatcam-whecl 12is made as shown in Fig. 9, one end or side being cut at an angle a little less than a right angle with the axis of the camwheel. The cam-wheel 12, ratchet-wheel 10, and hollow sleeve 11 are fastened together, so that their axes correspond with one another, and to them is pivoted the frame 13, so that the ratchet-wheel 10 will be between the two sides of the frame.

To the frame 13 is pivoted the pawl 14, (having on it the pin 19 extending beyond the frame,) held in contact with the teeth of the ratchet-wheel by the spring 15. To the frame is rigidly attached the arm 16, connected to the needle-bar by the link 17, one end of which is pivoted to the arm 16 and the other end to the needle-bar by the pin 18.

The cam-wheel 12 and frame are fastened to the faceplate M by a screw passing through the sleeve 11 into the face-plate, about which screw the sleeve and frame are free to turn independently of one another.

The cam-lever 20, having thereto attached a handle which passes through a slot in the side of the face-plate M, is held in position by the screw which passes through the sleeve 11, being free to turn about it. A spring, 22, attached to the face-plate M presses against the handle of the eam-lever 20 and retains it in any given position. The cam-lever 20 is of such a form that when turned in certain positions about the screw by which it is attached to the face-plate it will project through a greater portion of the are described by the pin 19 on the pawl 14 as it moves with the frame 13 than when said cam-lever 20 is turned in certain other positions about the attaching-screw, thereby regulating the portion of the arc of revolution through which the pawl 14 bears on or engages with the teeth of the ratchet wheel 10.

The extent of the oscillating rotary motion of the frame 13 is the same at each stroke of the needle-bar; but by changing the position of the cam-lever 20 the distance through which the cam-wheel is turned may be regulated.

A detent-spring, 21, attached to the inside of the face-plate, engages the ratchet-wheel 10 and prevents the return of the wheel with the frame.

The lever O has the same oscillations on its fulcrum caused. by the teeth on the wheel P,

'hereinbefore described, when the automatic changing-fulcrum (the lever 5) is used as when the fulcrum-screw It is used, and in addition to this the fulcrum of the lever O has motion caused by the oscillation of the lever 5, giving an oscillation to the ends of lever O, varying in extent as the lever 5 oscillates.

By changing the fulcrum-screw 6 and the cam-lever 20 a variety of different forms of stitches may be made by the machine. Some are shown in Figs. 14: and 16.

On properlugs on the face-plateis arranged the lever 30, so that one end is alongside the cam-wheel 12, heretofore described, and the other end alongside the needle-bar sleeve.

Passing through the face-plate M is the fulcrum-screw 31, at a point near the center of the length ofvthe lever 30, and abutting against thelever when screwed in. The fulcrum-screws R and 6 being withdrawn, the fu crum-screw 31 may be turned in against the lever 30, so as to press the lever at one end against the camwheel 12 and at the other against the needlebar sleeve K. The revolution of thecam-wheel 12 will cause thelever 30to oscillate as the face of the cam-wheel bearing against it changes, making one complete oscillation at each complete revolution of the cam-wheel 12, and as it always takes severalvertical reciprocations of the needle-bar to make one complete revolution of the cam-wheel 12, several stitches will be taken while-the needle-bar is making a complete horizontal oscillation. Any regulation of the fulcrum-screw 31 will regulate the extent of the horizontal oscillation, and by the cam-lever 20 the number of vertical oscillations to one horizontal oscillation may be regulated.

Figs. 15 and17 show specimens of the stitches made by the machine when this lever 30 is in operation.

The three fulcrum-screws, It, 6, and 31, may be turned in slightly, so that all three levers will be in operation, or any two may be turned in, giving as a result an irregular'stiteh,which repeats itself at regular intervals.

I am aware thataswingingneedle-bar sleeve and needle-bar have been used and are shown in Patent No. 184,860, of November 28, 1876, granted to me.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combinati0n,in a sewing-machine, of an overhanging arm, a fixed shuttle-race, a shuttle and mechanism for operatingthe same, a needle-bar, aframe for carrying said needlebar, mechanism for reciprocating the needlebar vertically and horizontally, and mechanism for automatically varying the horizontal movement of the needle-bar during the operation of the machine, substantiallyas described.

- 2. In a sewing-machine, the combination of the sleeve 11, cam-wheel 12, ratchet-wheel 10, frame 13, mechanism for oscillating said frame, pawl 14, having pin 19, a spring for insuring the engagement of the pawl with the ratchetwheel, cam-lever 20, and spring 22, for retaining said cam-leverin any given position, whereby an intermittent rotary movement may be imparted to said cam-wheel, which movement may be varied as desired, substantially as and for the purpose specified.

3. The combination, with the driving-shaft E and eccentric G, of the levertT, having pivot-pin t, springs t and t ,ratchet-wheel P,and

the head of the machine having recesses in which the pivot-pin t is adapted to slide and turn, substantially as described.

4. The combination, with the needle-bar I, of the needle-bar sleeve K, spring S, lever 0, wheel P, having teeth thereon, mechanism for imparting an intermittent rotary movement to said wheel P, lever 55, its adjustable fulcrum 6, cam-wheel 12, and its operating mechanism, whereby a horizontal reciprocating movement maybe imparted to the needle-bar and said movement varied automatically, as set forth.

5. The combination, with the needle-bar sleeve K, of the spring S, lever 0, adjustable fulcrum R, wheel P, having teeth thereon, ratchet-wheel P, a sleeve connecting said wheels P and P, lever T, mechanism for operating said lever, adjustable fulcrum 6, camwheel 12, sleeve 11, ratchet-wheel 10, pawl 14, spring 15, frame 13, having arm 16, link 17, needle-bar I, and mechanism for imparting a vertical reciprocating movement to said needlebar, as set forth.

6. The combination, with the needle-bar I, of the needle-bar sleeve K, springs, levers O, 5,, and 30, their adj ustable fulcrums and mechanism for vibrating said levers, substantially I LEV. GRISWOLD.

Witnesses:

G, G. FRELINGHUYSEN, J 0s. J. S LLIVAN. 

